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STM6522AAAADG6F

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25
List of figures STM6522
4/25 Doc ID 17045 Rev 3
List of figures
Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4. Single-button Smart Reset™ typical hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 5. Dual-button Smart Reset™ typical hookup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 6. Timing waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 7. STM6522 timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 8. Supply current (I
CC
) vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 9. Smart Reset delay (t
SRC
) vs. temperature, C
SRC
= 0.6 µF. . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 10. Reset timeout period (t
REC
) vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 11. Smart Reset™ input voltage threshold vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 12. AC testing input/output waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 13. TDFN – 8-lead 2 x 2 x 0.75 mm, 0.5 mm pitch package outline. . . . . . . . . . . . . . . . . . . . . 17
Figure 14. Landing pattern - TDFN – 8-lead 2 x 2 mm without thermal pad . . . . . . . . . . . . . . . . . . . . 18
Figure 15. Carrier tape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 16. Reel dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 17. Tape trailer/leader. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 18. Pin 1 orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 19. Package marking, top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
STM6522 Description
Doc ID 17045 Rev 3 5/25
1 Description
The Smart Reset™ devices provide a useful feature that ensures that inadvertent short
reset push-button closures do not cause system resets as the extended Smart Reset™
delay setup periods are implemented. Once the valid Smart Reset™ input levels and setup
delay are met, the device generates an output reset pulse for a fixed timeout period (t
REC
).
The typical application hookup shows that either a single Smart Reset™ input, or both reset
inputs can be connected to the applications interrupt and control both the interrupt pin and
the hard reset functions. If the push-button is closed for a short time, the processor is only
interrupted. If the system still does not respond properly, holding the push-button(s) for the
extended setup time (t
SRC
) causes a hard reset of the processor. The Smart Reset™
feature helps significantly increase system stability and eliminates the need for a dedicated
reset button.
The STM65xx family of Smart Reset™ devices consists of low-current microprocessor reset
circuits targeted at applications such as MP3 players, portable navigation or mobile phones,
generally any application that requires delayed reset push-button(s) response for improved
system stability. The devices in the STM65xx Smart Reset™ family include various
combinations of useful features for the targeted applications.
The STM6522 has two combined Smart Reset™ inputs (SR0
and SR1) with delayed reset
setup time (t
SRC
) programmed by an external capacitor on the SRC pin.
Figure 1. Logic diagram
AM04867v2
V
CC
SR0
RST1
RST2
V
SS
STM6522
SR1
SRC
Description STM6522
6/25 Doc ID 17045 Rev 3
Figure 2. Pin connections
Figure 3. Block diagram
Table 1. Signal names
Symbol
Input/
output
Description
RST1
Output Open-drain reset output, active-low, no internal pull-up resistor.
RST2
Output Open-drain reset output, active-low, no internal pull-up resistor.
SR0
Input
Primary push-button Smart Reset™ input, active-low, fixed voltage input logic
levels, no internal pull-up.
SR1
Input
Secondary push-button Smart Reset™ input - combines with the primary push-
button reset to provide setup delay time, active-low, fixed voltage input logic
levels, no internal pull-up.
SRC Input
Smart Reset™ input delay setup control: connect to an external capacitor to
adjust the delay setup time (t
SRC
).
V
CC
Supply
Supply voltage input. Power supply for the device. A 0.1 µF decoupling ceramic
capacitor is recommended to be connected between V
CC
and V
SS
pins.
V
SS
Supply Supply ground.
NC No connect (not bonded); should be connected to V
SS
.
AM04868v2
SRC
NC
1
2
3
STM6522
4
8
7
6
5
RST2
V
SS
V
CC
SR1
SR0
RST1
SR0
RST1
t
REC
generator
RST2
SR1
AM04869v2
t
SRC
generator
SRC
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STM6522AAAADG6F

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Buy STM6522AAAADG6F
Manufacturer:
STMicroelectronics
Description:
Supervisory Circuits Smart Reset Cap Adjust Setup Delay
Lifecycle:
New from this manufacturer.
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